Sapphire Plug-ins for AVX2: TVChannelChange

S_TVChannelChange

Transitions between two input clips by simulating a channel
change on an old television set. The first clip goes black with bad reception,
followed by the second clip with bad reception. The reception improves over time
until only the second clip is left.

In the Sapphire Transitions category.

Inputs:

From:
Starts the transition with this clip.

To:
Ends the transition with this clip.

Parameters:

Load Preset:
Push-button
.
Brings up the Preset Browser to browse all available presets for this effect.

Save Preset:
Push-button
.
Brings up the Preset Save dialog to save a preset for this effect.

Dissolve Amount:
Default:
0,
Range:
0 to 1.
The transition ratio between the From and To inputs.
A value of 0 gives only the From input and a value of 1 gives only
the To input. By default this parameter automatically animates from
0 to 1 to perform a complete transition. The curve controlling this
parameter can be adjusted for more detailed control over the timing
of the dissolve. In the AVX1 version, Auto Trans must be disabled
for this parameter to be used.

Reception:
Default:
1.6,
Range:
0 or greater.
Master scale for all reception-oriented artifacts:
static, interference, ghosting, horizontal and vertical hold, hum
bars, and color stripes. Turn to zero to get perfect reception,
i.e. zero of each of the above artifacts.

Dead Time Style:
Popup menu, Default: Static Over Black
.
Selects what the channel change should look
like when there is no signal between the channels.

Black:
use black between the channels.

Static Over Black:
bad reception artifacts are displayed over black between the channels.

Static Over Dissolve:
the first channel dissolves into the second while reception
artifacts are applied to both.

Dead Time Duration:
Default:
0.2,
Range:
0 to 1.
The fraction of of the transition time to spend in between channels.

Dead Time Start:
Default:
0,
Range:
0 to 1.
The amount of time into the transition to start the channel change.
Set this to zero if you want the first channel to go straight to dead air.
Set this to one if you the second channel to snap in from dead air. If the parameter is
greater than zero, the reception on the outgoing channel will get worse before going to dead
air time. Conversely the new channel will get progressively better reception over time.

Static Parameters:

Static Amplitude:
Default:
0.8,
Range:
0 or greater.
Scales the brightness of the static noise. Scaled by Reception Master.
The static dot size is controlled by the TV Pixels parameter.

Static Density:
Default:
0.7,
Range:
0.01 to 1.
Density of the static; turn up to get more static
pixels; turn down to get only occasional static pixels.

Frequency:
Default:
1.28,
Range:
0 to 500.
Interference frequency. The look is very sensitive to this parameter.
Fractional values like 0.3 or 1.23 look better than integers. Animating it very slightly,
say from 1.27 to 1.3 gives a nice look.

Dots Speed:
X & Y, Default:
[100 -10],
Range:
any.
The dot pattern moves with this speed over time in X and Y.

Jitter Amount:
Default:
10,
Range:
0 to 1000.
Turning this up makes the dot pattern jitter randomly between frames
for more realism.

Horizontal Hold Parameters:

Horizontal Hold:
Default:
0.7,
Range:
0 or greater.
Horizontal hold causes the image to shift horizontally in a
semi-random way, simulating a TV with a bad horizontal hold circuit, or a signal
not strong enough to engage the horizontal hold. Scaled by Reception.

H Time Vary:
Default:
0.5,
Range:
0 or greater.
Modulates the horizontal-hold waves over time by this
amount. When increased, some frames will have more horizontal
shifting while other frames will have less.

Border Width:
Default:
0.05,
Range:
0 or greater.
A TV signal has a black border outside the displayed area; this
becomes visible when the horizontal hold isn't working. This parameter controls
the width of that black border. On the other side of the border, you see another
copy of the image.

Vertical Hold Parameters:

Vertical Hold:
Default:
0.8,
Range:
0 to 2.
Vertical hold causes the image to shift vertically in a rolling motion.
It's normally caused by a weak signal preventing the TV from locking on. This parameter
controls the fraction of the time that the image is having hold problems. Set to zero
for no vertical hold problems. Scaled by Reception.

V Frequency:
Default:
2,
Range:
0 or greater.
The frequency of vertical hold jumps. Decrease to get a
more consistent rolling motion, or increase to get a jumpier look.

V Random:
Default:
0.1,
Range:
0 or greater.
Controls how much randomness there is in the vertical hold
rolling motion. Set to zero for smooth rolling, 1 or more for jittery
behavior.

Border Height:
Default:
0.1,
Range:
0 or greater.
Like Border Width, this controls the vertical
border between frames that becomes visible when vertical hold is not
locked. Some static and closed-captioning and timecode information
will typically be visible in this border.

Border Data:
Default:
1,
Range:
0 to 10.
Brightness of the dots and lines that appear in the vertical blanking
interval specified by Border Width.

Tint Darks:
Default rgb:
[0 0 0].
Adds this color to the darker regions of the result.
Set this to a dark red-orange color for a negative-film effect look.

Other Parameters:

Ghosting:
Default:
0.6,
Range:
0 or greater.
Ghosts are copies of the image that result from multipath distortion
between the transmitter and the TV. Turn up this parameter to get stronger ghosts.
Scaled by Reception.

Bars Brightness:
Default:
0.3,
Range:
0 or greater.
Power line hum and other TV problems can cause rolling light and
dark bars to crawl up the screen. This can also be caused by failure to synchronize
a video camera to the TV output. This parameter controls the overall strength of
these bars. There are two sets of bars, one large and one small, that mutually
interfere. This parameter controls the overall brightness scale of the bars. Turn
to zero for no bars. Scaled by Reception.

Color Stripes Amplitude:
Default:
0.2,
Range:
0 or greater.
Another common form of interference, color stripes are
caused by phase shifts in the chroma signal, among other things. This parameter
controls the overall brightness of the color stripes. Scaled by Reception.

Tv Pixels:
Default:
720,
Range:
1 or greater.
The number of 'TV pixels' across the screen. Controls the size of the static,
interference, scanlines, and dropouts. Lower this to simulate a lower resolution TV.

Seed:
Default:
0.123,
Range:
0 or greater.
Used to initialize the random number generator. The actual
seed value is not significant, but different seeds give different
results and the same value should give a repeatable result.